Created attachment 23413 [details] Patch to stop the N130 generating repeated key events Hi, this is a bug similar to the NC20 patch that I submitted previously. The N130 is a new machine and there is also an N140 which will probably also have the problem but I do not have that machine to test. Distribution: Ubuntu Karmic Beta Kernel: 2.6.31-13-generic Prerequisites ============= This bug will not manifest unless the udev or hal has been configured to recognise the laptop. Steps to reproduce: =================== Press fn key plus up arrow to increase brightness, press fn key plus down arrow to decrease brightness Expected results ================ Screen brightness is increased or decreased Actual results ============== fn plus down arrow reduces brightness to minimum. fn plus up arrow increases brightness to maximum. Gnome interface becomes unusable: menus cannot be clicked, keyboard becomes unresponsive Workaround ========== The user can switch to a VT and then back to the GUI and this allows normal keyboard operation until they press fn+up or fn+down again. Comments ======== The behaviour observed is because the key release events after brightness up and brightness down are not generated. This has the effect of repeating the brightness up or brightness down keys indefinitely. This causes the "all or nothing" effect on brightness and the unresponsive Gnome GUI.
Created attachment 23414 [details] lspci -v output
Created attachment 23415 [details] dmesg output
I will be creating a linked bug report downstream in Ubuntu. I have tested a kernel with the patch and it works as expected. Signed-off-by: Barry Carroll <baz8080@gmail.com>
There is now a way to control force release mask from userspace, no more patches will be accepted for the kernel. See bug 14052.
Thanks Dmitry, I'll check it out.